Effect of groove configuration on mechanical properties and fracture behavior of 6061 Al alloy and CFRTP laser joint

Abstract

Laser surface texturing is generally a promising approach to enhance the adhesion property of metalthermoplastic hybrid structure, and the effect is related to the groove con guration. Laser joining of carbon ber reinforced thermoplastic composite (CFRTP) to 6061 Al alloy under various groove con guration was carried out, aimed to investigate the effect of groove width and depth on interfacial morphology, mechanical properties and fracture behavior of CFRTP/ Al joints. The tensile-shear force was tested, and the fracture surface and interface morphology were observed by scanning electron microscopy. Besides, the numerical simulation of temperature eld was conducted to reveal the joining mechanism. The results indicate that the tensile shear strength of CFRTP/ Al joint gradually increases with the increase of groove width and reaches the peak value of 22.8 MPa when the width is 0.5 mm, then it decreases as the groove width is further increased. Compared to groove width, the tensile shear strength of CFRTP/ Al joint presents similar variation trend with the increasing groove depth on Al alloy surface. When the groove depth reaches 0.6 mm, the maximum joint strength is 24.33MPa. After laser textured Al alloy, the surface fracture mode of CFRTP/Al laser joint features mixed fracture mode including cohesive fracture and interface fracture. This study provides a deeper understanding of the effect of groove con guration on the laser joining of CFRTP/ Al hybrid structure and potentially lays a foundation for the adjustment of suitable groove con guration toward obtaining the desired effect.

Effect of Process Parameters on Joint Performance in Hot Pressure Welding of 6061 Aluminum Alloy to CF/PA66

“…The results showed that the higher the surface roughness of aluminum alloy, the better the wettability of molten GFRTP and the stronger the joint mechanical properties. Liu et al [42] studied the effect of groove width and groove depth on the joint strength of Al/CFRTP. The results show that the tensile-shear strength of CFRTP/Al joints first increases and then decreases with the increase in groove width and groove depth.…”

Design and application of laser scanning strategy for machining deep surface grooves with a continuous-wave fiber laser

“…Laser grooves or patterns that affect material surface properties, such as adhesiveness, friction coefficient, wettability, and appearance [1][2][3][4], have many attractive applications. Lasers with short pulses in nanosecond range have been widely used for creating surface micro-patterns.…”